Version 2.6.4 of the FVWM can make a frame sticky (appear on all user
desktops) when setting the 'sticky' frame parameter to nil. This may
happen without any special user interaction, for example, when Emacs
-restores a saved desktop. A fix is to install version 2.6.7 of FVWM,
+restores a saved desktop. A fix is to install version 2.6.8 of FVWM,
see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31650.
** General X problems